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How about 928s4 calipers Eric, do you rebuild those?
We have a full set here we're experimenting with. The problem with the later Brembo's is... Brembo. They have made the kits unbearable. Each bore seal is $25.00. Each dust boot/wiper seal is $32.00. Now x8 ($456) or x16 ($962) and you've just covered the "rubber" bits for your restoration.
To refinish them properly requires fully stripping them, de-anodizing them, re-anodizing them in black, assembling them, clear coating in high temp clear and then re-machining the PORSCHE logo. There's another $400 per pair to get them like factory new.
Who's ready to pony up $849.00 per pair for these dime-a-dozen calipers? This is why I currently call them "throw-a-way" calipers.
The spring plates in the pad cavity are also a problem. Almost all of the fasteners need to be machined out. Small fastener in steel into an aluminum body.
Again, we're experimenting with some low cost finish alternatives. It's admittedly a back burner project.